Rancho Cucamonga, CA Data Centers & Crypto Mining: Data Center Noise Limits (2026)
Key Facts
- Code
- Dev Code Sec. 17.66.050
- Residential limit
- 65 day / 60 night
- Simple-tone cut
- Minus 5 dBA
- Commercial limit
- 70 day / 65 night
- Industrial cap
- 65 dBA at homes
Summary
Rancho Cucamonga caps residential-property-line noise at 65 dBA daytime and 60 dBA overnight under Development Code Section 17.66.050, and cuts each limit by 5 dBA for continuous simple-tone equipment like data-center chillers and generators.
If the intruding noise source is continuous and cannot reasonably be discontinued or stopped for a time period whereby the ambient noise level can be determined, each of the noise limits above shall be reduced five dBA for noise consisting of impulse or simple tone noise.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4999536; v21 updated 2026-07-15).
Full Breakdown
Development Code Section 17.66.050 sets exterior noise limits at the residential property line: 65 dBA from 7:00 a.m. to 10:00 p.m. and 60 dBA from 10:00 p.m. to 7:00 a.m. When a noise source is continuous and consists of simple-tone or impulse noise-which describes data-center cooling and backup generators-each limit drops 5 dBA, to 60 dBA day and 55 dBA overnight. Commercial and office uses face a 70/65 dBA limit. Industrial performance standards in Table 17.66.110-1 add lot-line caps of 70 to 85 dBA by class, but 65 dBA at any residential property line. The overnight simple-tone floor binds where industrial land meets homes.
Violations & Fines
Noise over the Section 17.66.050 limits is a Development Code violation; the planning director may require the ambient level to be established, and enforcement runs through citations, permit conditions, and abatement.
Frequently Asked Questions
How loud can a data center be in Rancho Cucamonga?
What noise rule covers data-center chillers and generators in Rancho Cucamonga?
Sources & Official References
Other rules in Rancho Cucamonga
California rules heatmap·Compare Rancho Cucamonga to another location·View the California data centers & crypto mining overview
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